

Part number 704-174 is a thrust washer used to manage axial loads and maintain proper spacing within the gearbox or pump drive of compatible airless sprayers. This component reduces friction between moving parts and helps prevent metal-to-metal contact. It is compatible with a wide range of models including 340 Airless Sprayer International Model; 440 i Airless Sprayer; 440 IX Airless Sprayer; 440i Airless Sprayer1; 540 IX Airless Sprayer; 640 i Airless Sprayer; 640 IX Airless Sprayer; 740 i Airless Sprayer; 740 IX ; 740 ix Airless Sprayer; Advantage 400; Advantage 500; Advantage 600; Impact 410; Impact 440 service; impact 640 I and IA; impact 640; impact X 410; impact X 440; impact X 540i; Performer 640 i Airless Sprayer; RentSpray 450; RentSpray 500; RentSpray 600 Impact; RentSpray 600; RentSpray 650; RentSpray Plus. Replacing a worn thrust washer restores proper gear alignment and reduces noise and vibration.
| Part Number | 704-174 |
|---|---|
| Part Description | Thrust Washer |
| Compatible Models | 340 Airless Sprayer International Model; 440 i; 440 IX; 440i; 540 IX; 640 i; 640 IX; 740 i; 740 IX; 740 ix; Advantage 400, 500, 600; Impact 410, 440 service, 640 I and IA, 640; Impact X 410, 440, 540i; Performer 640 i; RentSpray 450, 500, 600 Impact, 600, 650, Plus |
| Condition | New |
The 704-174 thrust washer is a precision component installed in the gearbox or pump drive of compatible airless sprayers. Its primary function is to absorb axial thrust loads and maintain correct clearance between rotating gears and stationary housings. By doing so, it reduces friction, prevents metal-to-metal contact, and helps extend the life of gears and bearings. This washer is designed for use in an extensive list of models, including 340 Airless Sprayer International Model; 440 i; 440 IX; 440i; 540 IX; 640 i; 640 IX; 740 i; 740 IX; 740 ix; Advantage 400, 500, 600; Impact 410, 440 service, 640 I and IA, 640; Impact X 410, 440, 540i; Performer 640 i; RentSpray 450, 500, 600 Impact, 600, 650, and RentSpray Plus. Over time, thrust washers can wear thin due to constant pressure and lubrication breakdown. When this happens, excessive end play develops, leading to gear misalignment, increased noise, and potential damage to surrounding components. Symptoms of a worn thrust washer include a knocking or rattling sound from the drive housing, vibration during operation, or metal particles in the gear oil. Replacing the thrust washer restores proper spacing and smooth operation. It is a critical part of any major gearbox repair and should be replaced alongside bearings and seals to ensure reliable performance. Using the correct washer thickness is essential for maintaining factory tolerances.
| Axial load management | Absorbs thrust forces from gears to prevent housing wear |
|---|---|
| Clearance control | Maintains proper end play between rotating and stationary parts |
| Friction reduction | Provides a low-friction surface to improve efficiency |
| Excessive gear noise | Knocking or rattling indicates worn washer and excess play |
|---|---|
| Vibration | Misaligned gears cause noticeable vibration during operation |
| Metal particles in oil | Worn washer material contaminates lubricant |
| Measurable end play | Axial movement beyond specifications requires adjustment |
Part number 704-174 is compatible with the following sprayer models. Always verify using your equipment's serial number and parts manual.
| Series | Specific Models |
|---|---|
| International | 340 Airless Sprayer |
| i / IX Series | 440 i, 440 IX, 440i, 540 IX, 640 i, 640 IX, 740 i, 740 IX, 740 ix |
| Advantage | 400, 500, 600 |
| Impact / Impact X | 410, 440 service, 640 I and IA, 640; X 410, X 440, X 540i |
| Performer | 640 i |
| RentSpray | 450, 500, 600 Impact, 600, 650, Plus |
When replacing the thrust washer, inspecting these associated components can help ensure a complete repair.
Check for worn or chipped teeth; excessive wear may require gear replacement.
Support shaft alignment; replace if rough or loose.
Prevent lubricant leakage; always replace when opening the gear case.